/* LzmaRamDecode.c */
#include "LzmaRamDecode.h"
#ifdef _SZ_ONE_DIRECTORY
#include "LzmaDecode.h"
#include "BranchX86.h"
#else
#include "../LZMA_C/LzmaDecode.h"
#include "../Branch/BranchX86.h"
#endif
#define LZMA_PROPS_SIZE 14
#define LZMA_SIZE_OFFSET 6
int LzmaRamGetUncompressedSize(
unsigned char *inBuffer,
size_t inSize,
size_t *outSize)
{
unsigned int i;
if (inSize < LZMA_PROPS_SIZE)
return 1;
*outSize = 0;
for(i = 0; i < sizeof(size_t); i++)
*outSize += ((size_t)inBuffer[LZMA_SIZE_OFFSET + i]) << (8 * i);
for(; i < 8; i++)
if (inBuffer[LZMA_SIZE_OFFSET + i] != 0)
return 1;
return 0;
}
#define SZE_DATA_ERROR (1)
#define SZE_OUTOFMEMORY (2)
int LzmaRamDecompress(
unsigned char *inBuffer,
size_t inSize,
unsigned char *outBuffer,
size_t outSize,
size_t *outSizeProcessed,
void * (*allocFunc)(size_t size),
void (*freeFunc)(void *))
{
int lc, lp, pb;
size_t lzmaInternalSize;
void *lzmaInternalData;
int result;
UInt32 outSizeProcessedLoc;
int useFilter = inBuffer[0];
*outSizeProcessed = 0;
if (useFilter > 1)
return 1;
if (inSize < LZMA_PROPS_SIZE)
return 1;
lc = inBuffer[1];
if (lc >= (9 * 5 * 5))
return 1;
for (pb = 0; lc >= (9 * 5); pb++, lc -= (9 * 5));
for (lp = 0; lc >= 9; lp++, lc -= 9);
lzmaInternalSize = (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp))) * sizeof(CProb);
lzmaInternalData = allocFunc(lzmaInternalSize);
if (lzmaInternalData == 0)
return SZE_OUTOFMEMORY;
result = LzmaDecode((unsigned char *)lzmaInternalData, (UInt32)lzmaInternalSize,
lc, lp, pb,
inBuffer + LZMA_PROPS_SIZE, (UInt32)inSize - LZMA_PROPS_SIZE,
outBuffer, (UInt32)outSize,
&outSizeProcessedLoc);
freeFunc(lzmaInternalData);
if (result != LZMA_RESULT_OK)
return 1;
*outSizeProcessed = (size_t)outSizeProcessedLoc;
if (useFilter == 1)
{
UInt32 _prevMask;
UInt32 _prevPos;
x86_Convert_Init(_prevMask, _prevPos);
x86_Convert(outBuffer, (UInt32)outSizeProcessedLoc, 0, &_prevMask, &_prevPos, 0);
}
return 0;
}
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